看过这篇么？

https://www.medicalnewstoday.com/articles/what-are-the-neurological-complications-of-covid-19

Viral infections can impact the brain, even if the virus has not directly infected brain tissue. For example, inflammation of the brain, or encephalitis, most often results from a viral infection. 

These infections usually cause mild, flu-like symptoms, but when they affect the brain, the issues can be severe.